import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'

Vue.use(Router)

const router = new Router({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    { path: '/home', component: Home }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 一个函数，表示放行
  // next()  放行   next('/login)  强制跳转
  if(to.path==='/login') return next()
  //获取token
  const tokenstr=window.sessionStorage.getItem('token')
  if(!tokenstr) return next('/login')
  next()
})


export default router

